Reinhold Baer (1913-2005) was a German-American mathematician known for his contributions to algebra and topology. He made significant advancements in the fields of group theory and ring theory, and he is often recognized for his work in homological algebra and the theory of algebraic structures. Baer introduced concepts such as Baer subgroups in group theory and contributed to the development of concepts in homological algebra, including Baer invariants and Baer modules.
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